Stalker of the Innocent

When this creature transforms into Stalker of the Innocent,
create three 1/1 Human tokens.
Sacrifice a creature: Put two +1/+1 counters
on Stalker of the Innocent. It gains menace until
end of turn.
His eyes darted around at those leaning over
his bed, 'we never saw it coming'
- last words of a Paesmouth Guard.